INITIAL OUTSIDE AIR SAFETY CHECK10-77. The JM places their lead hand inside the handle and secures the trail edge of the paratroop door with their trail hand. They walk out onto the jump platform, with both feet on the jump platform, and stand outside the aircraft locking both elbows out. From this stable position the JM visually conducts a down-and-behind air-safety check. Once the initial clear to the rear is complete, the JM returns to the relaxed door position and looks at the jumpers, then the safety, comes to a rest position, and waits for the one-minute reference point.Note. JMs are encouraged to conduct checks in all cardinal directions to maintain the best situational awareness.10-78. Once the doors are open and the jumpmasters are conducting their door checks, safeties will have all the jumpers close in tight, reducing all the jumper interval between the No. 1 jumper and the paratroop door. Once room permits, all jumpers will extend their arms before moving. Jumpers will maintain the proper interval.10-79. The JM will lock out their elbows to properly conduct outside air safety checks, the safety will also lock out their elbows while checking for towed jumpers after each pass.10-80. The loadmaster should relay time warnings to the JM or safety by using hand signals. The exact hand signals must be coordinated between the JM and loadmaster during the aircrew brief.One-minute time warning—with the elbow locked out, the index finger extended vertically;30-second time warning—with the elbow locked out, the index finger and thumb held closely together.WARNINGDo not sacrifice safety for time. Complete the full inspection of each jumper’s USLM. If the inspection cannot be completed in time, the pass will be aborted. An improperly routed USLM can cause death or serious injury.ONE-MINUTE TIME WARNING. The JM issues the time warning to the jumpers with their lead hand and then resecures a handhold with their lead hand by grasping the troop door guide or the handhold provided on the lead edge of the door. The JM continues to watch for any unsafe conditions and spots for the 30-second reference point.THIRTY-SECOND TIME WARNING. Once the 30-second reference point is identified, issue the 30-second time warning with the lead hand and then immediately make the final clear to the rear. The JM will then rotate into the aircraft, let go of the paratroop door, and with their body facing towards the jumpers, issue a thumb up to the JM on the opposite paratroop door indicating that all conditions outside the aircraft are safe.CAUTIONThe JM or the safety can call a NO DROP anytime they determine something is wrong or unsafe.Note. JMs will not issue the command of “STAND BY” until the amber light is on.